Abstract
Objectives: Testing of a cation exchanger based water treatment apparatus and an Amberlite IR 120 Na resin medium to reduce the manganese content in the well-water is proposed. Methods/Statistical Analysis: Testing was done by wellwater treatment in a fixed bed cation exchanger in continuous flow. The variables used were the resin mass and flow rate and its effect on the manganese concentration in the outflow of the equipment. Manganese content was analyzed by Atomic Absorption Spectrophotometry (AAS) method. The isothermal adsorption equation was tested by the Freundich and Langmuir equations. Findings: The result of this research showed Amberlite resin IR 120 Na adsorbed manganese ion was about 96.3-98.9%; the optimal resin mass about 20 grams with a flow rate about 0.04 L.s-1 when viewed from an economic point. Resin absorption power to manganese increases with decreasing flow rate and increasing resin mass. Freundlich equation with constant n = 0.6539 and Kf = 4.6644 with correlation coefficient 0.7957. Langmuir equation with a constant As = -0.0927 and Kb = -6.3820 with a correlation coefficient -0.4314. Application/Improvements: Cation exchanger using Amberlite IR 120 Na resin media capable of remove manganese in well-water with efficiency > 96% and resin can be regenerated again. Keywords: Cation Exchange, Isothermal Adsorption, Removal Manganese, Spectrophotometry Method, Water Treatment
Highlights
The content of ions and elements in ground water have varies for different locations
This study is studied about the effect the changing of resin mass and flow rate to the efficiency of Amberlite resin IR 120 Na for decreasing Mn content from well water
This study would study about isotherm adsorption kinetics of Amberlite resin IR 120 Na to manganese contained in well-water
Summary
The content of ions and elements in ground water have varies for different locations. They can be affected by water processing, soil erosion processing, and anthropogenic sources The content of manganese in water[3] is about 0.0004 until 0.2 mg.L-1. Based on World Health Organization, the content of manganese in the water[4] has maximum about 0.1 mg.L-1. In Indonesia there is Well-water which consists of manganese above the maximum water requirements. Based on Regulation of Indonesia Health Minister[5], the standardize of clean water contains maximum manganese about 0.5 mg.L-1.
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